CN103375870A - Intelligent refrigerating capacity adjusting method for variable flow air conditioning system - Google Patents
Intelligent refrigerating capacity adjusting method for variable flow air conditioning system Download PDFInfo
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- CN103375870A CN103375870A CN2012101118497A CN201210111849A CN103375870A CN 103375870 A CN103375870 A CN 103375870A CN 2012101118497 A CN2012101118497 A CN 2012101118497A CN 201210111849 A CN201210111849 A CN 201210111849A CN 103375870 A CN103375870 A CN 103375870A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000001704 evaporation Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000012937 correction Methods 0.000 claims description 5
- 238000013459 approach Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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Abstract
The invention provides an intelligent refrigerating capacity adjusting method for a variable flow air conditioning system, which can correct the operation parameters of an outdoor unit to compensate the loss of the refrigerating capacity of a unit and greatly improve the stability of the refrigerating effect of the air conditioning unit. The detection element of the air conditioning system detects the evaporation temperature of the evaporator and the suction pressure of the compressor and sends a detection signal to the control system of the air conditioning system; and after receiving the detection signal, the control system calculates the saturation temperature corresponding to the suction pressure of the compressor. The control system calculates the temperature difference between the evaporation temperature of the evaporator and the saturation temperature corresponding to the suction pressure of the compressor according to the detection signal sent by the detection element, and then judges the loss of the refrigerating capacity of the air conditioning system according to the temperature difference; when the control system of the air conditioning system judges that the refrigerating capacity loss value of the air conditioning system reaches a set value, an instruction is sent to correct the operation parameters of the outdoor unit, the refrigerating capacity loss is compensated, and the indoor unit is ensured to obtain enough capacity.
Description
Technical field
The present invention relates to the control technology field of air-conditioning system, particularly relate to a kind of refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system.
Background technology
The variable flow direct evaporation type refrigerated air-conditioning system is comprised of indoor set and off-premises station.The parts such as choke valve that mainly comprise compressor, condenser, evaporimeter and changeable flow.Off-premises station is connected by connecting line with indoor set.Because the setting of connecting line make a slip of the tongue and have certain drag losses the journey so that cold-producing medium flow to compressor air suction from evaporimeter, the flow of cold-producing medium reduces, and then so that the refrigerating capacity of air-conditioning unit descend.And connecting line is longer, and this drag losses is just larger, and refrigerating capacity descends also larger, and it directly affects efficient and the security of system's operation.For the variable-flow air-conditioning system, after refrigerating capacity that drag losses brings descends, certainly will require off-premises station to carry out Intelligent Measurement and operation mode adjusting, guarantee that indoor set can obtain due refrigerating capacity.Prior art does not also have desirable scheme, is used for the adjusting of the refrigerating capacity of variable-flow air-conditioning system.
Summary of the invention
The object of the present invention is to provide a kind of refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system, can the off-premises station operational factor be revised, with the refrigerating capacity loss of compensation unit, can greatly improve the stability of air-conditioning unit refrigeration.
The present invention is achieved through the following technical solutions:
Be used for the refrigerating capacity intelligent adjusting method of variable-flow air-conditioning system, wherein, the detecting element of air-conditioning system detects the evaporating temperature of evaporimeter and the pressure of inspiration(Pi) of compressor, detection signal is sent to the control system of air-conditioning system; Control system is judged the size of air-conditioning system refrigerating capacity loss according to the detection signal that receives; The control system of air-conditioning system judges that air-conditioning system refrigerating capacity loss numerical value reaches when setting numerical value, sends the operational factor of instruction correction off-premises station, and the loss of compensation refrigerating capacity guarantees that indoor set can obtain enough abilities.
Further, the detection signal that control system sends according to detecting element calculates the evaporating temperature of evaporimeter and the temperature difference of the corresponding saturation temperature of pressure of inspiration(Pi) of compressor, then judges the size that the air-conditioning system refrigerating capacity is lost according to this temperature approach.
Further, the corresponding saturation temperature of pressure of inspiration(Pi) is calculated by described control system and is obtained.
Further, behind restricting element, the evaporator inlet place is provided with temperature sensing device, temperature sensing device detects evaporator Guan Wen, and temperature detection signal is sent to the control system of air-conditioning system; In the compressor of outdoor unit porch, be provided with pressure-detecting device, pressure-detecting device detects the pressure of inspiration(Pi) before the suction port of compressor; And pressure detecting signal is sent to the control system of air-conditioning system.
Further, described temperature sensing device is the temperature-sensitive bag.
Further, described pressure-detecting device is pressure sensor.
Beneficial effect of the present invention is as follows:
Air-conditioning system is in the process of actual motion, cold-producing medium exists friction loss and local resistance loss inevitably in flow process, longer when the indoor and outdoor machine connecting line, when the flow of refrigerant drag losses is larger, then can greatly weaken the refrigerating capacity of air-conditioning unit.Refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system of the present invention, after in the air-conditioning unit, using, just can judge more exactly the drag losses of cold-producing medium in flow process according to detected evaporating temperature and the corresponding saturation temperature of suction pressure of compressor, and feed back to off-premises station and carry out the parameter correction.Can avoid like this keeping the stability of air conditioner refrigerating ability because the larger refrigerating capacity of bringing of drag losses descends, can significantly promote the actual motion effect of air-conditioning.
Description of drawings
Fig. 1 is for using the present invention for system's composition structural representation of the variable-flow air-conditioning system of the refrigerating capacity intelligent adjusting method of variable-flow air-conditioning system;
Fig. 2 is for using the present invention for the drag losses schematic diagram of the variable-flow air-conditioning system of the refrigerating capacity intelligent adjusting method of variable-flow air-conditioning system;
Fig. 3 is the schematic flow sheet that the present invention is used for the refrigerating capacity intelligent adjusting method of variable-flow air-conditioning system.
The specific embodiment
The present invention is in order to solve cold-producing medium drag losses in flow process of prior art variable-flow air-conditioning system, greatly weaken the problem of the refrigerating capacity of air-conditioning unit, a kind of refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system has been proposed, wherein, the detection signal that control system sends according to detecting element calculates the evaporating temperature of evaporimeter and the temperature difference of the corresponding saturation temperature of pressure of inspiration(Pi) of compressor, then judges the size that the air-conditioning system refrigerating capacity is lost according to this temperature approach; The control system of air-conditioning system judges that air-conditioning system refrigerating capacity loss numerical value reaches when setting numerical value, sends the operational factor of instruction correction off-premises station, and the loss of compensation refrigerating capacity guarantees that indoor set can obtain enough abilities.
Above-mentioned refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system, the acquisition methods of the temperature difference of the corresponding saturation temperature of pressure of inspiration(Pi) of the evaporating temperature of evaporimeter and compressor is: the detecting element of air-conditioning system detects the evaporating temperature of evaporimeter and the pressure of inspiration(Pi) of compressor, detection signal is sent to the control system of air-conditioning system; After control system receives detection signal, calculate the corresponding saturation temperature of pressure of inspiration(Pi) of compressor.
Embodiment:
As shown in Figure 1, in the present embodiment, the variable-flow air-conditioning system includes: off-premises station, indoor set and connecting line 30,70 form.Off-premises station includes compressor 10 and condenser 80, indoor set includes evaporimeter 40, changeable flow restricting element 60 (such as electric expansion valve etc.) is arranged on indoor set, simultaneously behind restricting element 60, the evaporator inlet place is provided with temperature-sensitive bag 50, temperature-sensitive bag 50 detects evaporator Guan Wen, and temperature detection signal is sent to the control system of air-conditioning system; In the compressor of outdoor unit porch, be provided with pressure sensor 20, pressure sensor 20 detects the pressure of inspiration(Pi) before the suction port of compressor; And pressure detecting signal is sent to the control system of air-conditioning system.
As shown in Figure 2, be the drag losses schematic diagram of variable-flow air-conditioning system of the present invention; Among Fig. 2, label 1 to 6 position is corresponding with label 1 to 6 position among Fig. 1, wherein:
The P1-suction pressure of compressor;
The P2-Compressor Discharge Pressure;
The P3-condenser goes out hydraulic coupling;
P4-restricting element inlet hydraulic;
P5-evaporimeter inlet hydraulic;
The P6-evaporimeter goes out atmospheric pressure.
Evaporator temperature-sensitive bag 50 detects evaporator evaporation temperature T 1, and the off-premises station pressure sensor detects saturation temperature T2 corresponding to pressure of inspiration(Pi); The temperature difference of T1-T2 can characterize evaporating pressure and pressure of inspiration(Pi) is poor, and this pressure differential (P6-P1 among Fig. 2) is exactly that cold-producing medium flow to the existing drag losses of compressor air suction mouth from evaporimeter.
According to the temperature difference T difference that calculates, the determined Δ T of experiment, relatively both sizes.And according to this result the operational factor of off-premises station is carried out suitable correction.
The control principle of whole system is illustrated in fig. 3 shown below:
Described refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system comprises the steps:
S1 variable-flow air-conditioning system start operation;
The S2 control system detects evaporator pipe temperature T1 and suction pressure of compressor P1, calculates saturation temperature T2 corresponding to pressure of inspiration(Pi) according to suction pressure of compressor P1 again;
S3 calculates T difference=T1-T2;
S4 compares the difference DELTA T of T difference and setting, judges whether T difference≤Δ T, in this way, then enters S5, as no, then enters S6;
The S5 off-premises station is kept current running status;
S6 compares the evaporator pipe temperature higher limit T3 of evaporator pipe temperature T1 and setting;
S7 judges whether T1≤T3, is, then enters S5, as no, then enters S8;
S8 increases the fan-out capability of off-premises station.
Among the step S8, the method that increases the fan-out capability of off-premises station is: revise the running of the compressor of off-premises station, improve its running frequency.
Described refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system, concrete steps can be specifically described as:
Indoor restricting element keeps the constant evaporation degree of superheat, namely keeps constant flow, and the detected temperature of temperature sensor is evaporator pipe temperature T1, owing to be the state after the cold-producing medium throttling, so temperature also is evaporating temperature. hereinPressure sensor detects the Guan Wen before the suction port of compressor, and namely pressure of inspiration(Pi) P1 converses saturation temperature T2 corresponding to pressure of inspiration(Pi) according to P1 again.Calculate T difference=T1-T2, and with this difference and by experiment determined difference DELTA T compare, when T difference≤Δ T, illustrate that the drag losses of cold-producing medium in flow process is less, the cooling system capacity loss is less, and then off-premises station keeps current running status.When T difference＞Δ T, illustrate that the drag losses of cold-producing medium in flow process is larger, then further relatively manage warm T1 and determined inner tube temperature higher limit T3 by experiment, if T1≤T3, illustrate that then the evaporator tube temperature is suitable, the cooling system ability satisfies current demand.Then off-premises station continues to keep current running status, if T1＞T3, then explanation pipe temperature is too high, the refrigerating capacity loss is larger, then revises the running of the compressor of off-premises station, improves its running frequency, with the loss of compensation unit refrigerating capacity, final so that the air-conditioning unit keeps more stable refrigerating capacity.
For the variable-flow air-conditioning system, when constant, interior function power is relevant with evaporating pressure in the evaporation degree of superheat, and the lower then refrigerating capacity of evaporating pressure is better, and the Guan Wen of interior machine of therefore controlling well is most important for the refrigerating capacity of maintenance unit.A kind of method of coming adjusting air conditioning group refrigerating capacity according to the drag losses of cold-producing medium in flow process that the present invention proposes.The method can be come the off-premises station operational factor is revised according to the difference of evaporator evaporation temperature and the corresponding saturation temperature of suction pressure of compressor, with the refrigerating capacity loss of compensation unit, can greatly improve the stability of air-conditioning unit refrigeration.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. be used for the refrigerating capacity intelligent adjusting method of variable-flow air-conditioning system, it is characterized in that the detecting element of air-conditioning system detects the evaporating temperature of evaporimeter and the pressure of inspiration(Pi) of compressor, detection signal is sent to the control system of air-conditioning system; Control system is judged the size of air-conditioning system refrigerating capacity loss according to the detection signal that receives; The control system of air-conditioning system judges that air-conditioning system refrigerating capacity loss numerical value reaches when setting numerical value, sends the operational factor of instruction correction off-premises station, and the loss of compensation refrigerating capacity guarantees that indoor set can obtain enough abilities.
2. the refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system according to claim 1, it is characterized in that, the detection signal that control system sends according to detecting element calculates the evaporating temperature of evaporimeter and the temperature difference of the corresponding saturation temperature of pressure of inspiration(Pi) of compressor, then judges the size that the air-conditioning system refrigerating capacity is lost according to this temperature approach.
3. the refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system according to claim 2 is characterized in that, the corresponding saturation temperature of pressure of inspiration(Pi) is calculated by described control system and obtained.
4. the refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system according to claim 3, it is characterized in that, behind restricting element, the evaporator inlet place is provided with temperature sensing device, temperature sensing device detects evaporator Guan Wen, and temperature detection signal is sent to the control system of air-conditioning system; In the compressor of outdoor unit porch, be provided with pressure-detecting device, pressure-detecting device detects the pressure of inspiration(Pi) before the suction port of compressor; And pressure detecting signal is sent to the control system of air-conditioning system.
5. the refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system according to claim 4, described temperature sensing device is the temperature-sensitive bag.
6. the refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system according to claim 4, described pressure-detecting device is pressure sensor.
7. the refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system according to claim 4 is characterized in that, comprises the steps:
S1 variable-flow air-conditioning system start operation;
The S2 control system detects evaporator pipe temperature T1 and suction pressure of compressor P1, calculates saturation temperature T2 corresponding to pressure of inspiration(Pi) according to suction pressure of compressor P1 again;
S3 calculates T difference=T1-T2;
S4 compares the difference DELTA T of T difference and setting, judges whether T difference≤Δ T, in this way, then enters S5, as no, then enters S6;
The S5 off-premises station is kept current running status;
S6 compares the evaporator pipe temperature higher limit T3 of evaporator pipe temperature T1 and setting;
S7 judges whether T1≤T3, is, then enters S5, as no, then enters S8;
S8 increases the fan-out capability of off-premises station.
8. the refrigerating capacity intelligent adjusting method for the variable-flow air-conditioning system according to claim 7 is characterized in that, among the step S8, the method that increases the fan-out capability of off-premises station is: revise the running of the compressor of off-premises station, improve its running frequency.
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| CN201210111849.7A CN103375870B (en) | 2012-04-16 | 2012-04-16 | Intelligent refrigerating capacity adjusting method for variable flow air conditioning system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048388A (en) * | 2014-07-10 | 2014-09-17 | 珠海格力电器股份有限公司 | Control method and device and air conditioner |
| CN104501370A (en) * | 2014-12-02 | 2015-04-08 | 广东美的制冷设备有限公司 | Air conditioner and control method for same |
| CN104864565A (en) * | 2015-05-21 | 2015-08-26 | 珠海格力电器股份有限公司 | Control method of air conditioning unit |
| CN105387666A (en) * | 2015-12-25 | 2016-03-09 | 珠海格力电器股份有限公司 | Method and device for controlling a condensing unit |
| CN105485853A (en) * | 2015-12-29 | 2016-04-13 | 珠海格力电器股份有限公司 | Method and device for setting running frequency of air-conditioning compressor |
| CN105650827A (en) * | 2016-03-02 | 2016-06-08 | 珠海格力电器股份有限公司 | Self-adaptive fault operation control method and system and air conditioning unit |
| CN108131805A (en) * | 2017-10-31 | 2018-06-08 | 宁波奥克斯电气股份有限公司 | A kind of multi-connected machine self_adaptive adjusting method and device |
| CN108731190A (en) * | 2018-06-15 | 2018-11-02 | 广东美的暖通设备有限公司 | Detection method, detection device and the detecting system of air-conditioner host parameter |
| CN111059727A (en) * | 2019-12-06 | 2020-04-24 | 徐州顺风阀门有限公司 | Frequency control method for air conditioner compressor |
| CN111578462A (en) * | 2019-02-18 | 2020-08-25 | 新奥数能科技有限公司 | Compressor regulation method and device of air conditioning system, readable medium and electronic equipment |
| CN112032921A (en) * | 2020-08-06 | 2020-12-04 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048388A (en) * | 2014-07-10 | 2014-09-17 | 珠海格力电器股份有限公司 | Control method and device and air conditioner |
| CN104048388B (en) * | 2014-07-10 | 2017-09-22 | 珠海格力电器股份有限公司 | Control method and device and air conditioner |
| CN104501370B (en) * | 2014-12-02 | 2017-05-24 | 广东美的制冷设备有限公司 | Air conditioner and control method for same |
| CN104501370A (en) * | 2014-12-02 | 2015-04-08 | 广东美的制冷设备有限公司 | Air conditioner and control method for same |
| CN104864565B (en) * | 2015-05-21 | 2018-01-05 | 珠海格力电器股份有限公司 | Control method of air conditioning unit |
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| CN105387666A (en) * | 2015-12-25 | 2016-03-09 | 珠海格力电器股份有限公司 | Method and device for controlling a condensing unit |
| CN105387666B (en) * | 2015-12-25 | 2017-11-14 | 珠海格力电器股份有限公司 | Method and device for controlling a condensing unit |
| CN105485853A (en) * | 2015-12-29 | 2016-04-13 | 珠海格力电器股份有限公司 | Method and device for setting running frequency of air-conditioning compressor |
| CN105485853B (en) * | 2015-12-29 | 2018-11-09 | 珠海格力电器股份有限公司 | Method and device for setting running frequency of air-conditioning compressor |
| CN105650827A (en) * | 2016-03-02 | 2016-06-08 | 珠海格力电器股份有限公司 | Self-adaptive fault operation control method and system and air conditioning unit |
| US11919363B2 (en) | 2017-08-25 | 2024-03-05 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US11254183B2 (en) | 2017-08-25 | 2022-02-22 | Dometic Sweden Ab | Recreational vehicle, cooling device, controlling system and method for controlling the cooling device |
| US10941955B2 (en) | 2017-10-27 | 2021-03-09 | Dometic Sweden Ab | Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle |
| CN108131805A (en) * | 2017-10-31 | 2018-06-08 | 宁波奥克斯电气股份有限公司 | A kind of multi-connected machine self_adaptive adjusting method and device |
| CN108131805B (en) * | 2017-10-31 | 2020-07-10 | 宁波奥克斯电气股份有限公司 | Multi-split self-adaptive adjustment control method and device |
| CN108731190B (en) * | 2018-06-15 | 2020-09-15 | 广东美的暖通设备有限公司 | Detection method, detection device and detection system for air conditioner host parameters |
| CN108731190A (en) * | 2018-06-15 | 2018-11-02 | 广东美的暖通设备有限公司 | Detection method, detection device and the detecting system of air-conditioner host parameter |
| CN111578462A (en) * | 2019-02-18 | 2020-08-25 | 新奥数能科技有限公司 | Compressor regulation method and device of air conditioning system, readable medium and electronic equipment |
| CN111578462B (en) * | 2019-02-18 | 2021-11-02 | 新奥数能科技有限公司 | Compressor regulation method and device of air conditioning system, readable medium and electronic equipment |
| CN111059727A (en) * | 2019-12-06 | 2020-04-24 | 徐州顺风阀门有限公司 | Frequency control method for air conditioner compressor |
| CN112032921A (en) * | 2020-08-06 | 2020-12-04 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, air conditioner and storage medium |
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Effective date of registration: 20200622 Address after: Room 317, 416 jingwan Road, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Patentee after: Zhuhai Gree Electromechanical Engineering Co.,Ltd. Address before: 519000 No. six Jinji Road West, Zhuhai, Guangdong Patentee before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI |